Best for: People who prefer an herbal remedy.
How it works: This spicy root aids digestion, which quells nausea. A 2003 study published in the American Journal of Physiology—Gastrointestinal and Liver Physiology found that people who took a ginger supplement before going on a simulated amusement-park ride were less nauseated than those who didn’t. Pop a 1,000- to 2,000-milligram supplement about an hour before your trip, says Julie Chen, a physician in San Jose, California.
Good to know: Ginger can thin the blood, so consult your doctor first if you’re on blood-pressure medication.